Thirds of his right to calvffl s



(No Model.)

N O T G N h 0 Dn De r U W a. W

Paten ted Aug. 31,1880.

llllllllllllllll C1 it a 45 serrated to fit at any/p of the shank.

In a slot, g f rmed in the lowerlsi de of the movabl ,is pivoted'the ca ntshaped end of a handl e, Lewis-handle being adapted NITED STATES Brice.

PATENT WILLIAM C. OODDINGTON, OF BALTIMORE, MARYLAND, ASSIGNOR OF TWO- THIRDS OF HIS RIGHT TO CALVIN S. SHRIVER AND HENRY I). SHRIVER,

OF SAME PLACE.

WRENCH.

SPECIFICATION forming part of Letters Patent No. 231,763, dated August 31, 1.880,

Application filed J une 7, 1880. (No model.)

To all whom it may concern.-

Be it known that I, WILLIAM G. CODDING- TON, of Baltimore, Maryland, have invented a new and useful Improvement in Wrenches;

and I hereby declare the following to be afull,

clear, and exact description of the same.

My invention is an improvement upon wrenches of the class in which the movable jaw is made to slide upon the shank, and is held upon said shank at any required point by means ofa plate, serrated or smooth, pressed upon the said shank by means of a cam pivoted in the jaw itself.

In implements of this class the details are 1 of importance, sincethey relate to the easy and unobstructed movement of the movable jaw and to its firm hold upon the shank. Both of these requirements are essential to the practical operation of such implements.

My invention consists in the combination of a serrated holding-plate (whether used with or without compensating plates) with a peculiar form of recess or chamber in the movable jaw of the wrench and in hereinafter-described 2 5 relation to the cam which presses said jaw upon the serrated edge of the shank.

In the drawin gs hereunto attached, and forming part of this specification, Figure 1 is a side elevation of the wrench, with movable jaw in 0 section. Figs. 2 and 3 represent details hereinafter explained. Fig. 4 is a section of the jaw separate from the wrench, and Fig. 5 is a central transverse section of the same. Fig.

, 6 shows a modification in which a thumb-screw 3 5 is substituted for a cam.

In these drawings, A represents the movable jaw. It is considerably elongated, and is provided with two straps, a a, which surround the shank of the wrench. Opposite the inte- 0 riorsurfaces of these two strapsare corresponding abutments, which form, the opposite side of the opening through which the shank slides.

fl Between these two aents is a recess, b;

fitted to receive a bloc he face of which is t the serrate di edge to bear against the lower side of the and to press it against the serrated edg of the shank, so as to hold the jaw securely a n required point.

What has been described above in t ese more general terms has been shown partly in the patent of McManus, No. 14,571,0fApril1, 1856, and partly in the patent of Knisely, N 0. 109,913, of December 6, 1870; but my invention more particularly relates toythe form of the recess which contains the. block and to the block itself. This recess is shown more particularly in Fig. 5. It is formed with four sides and with a bottom, 1), upon which the block may rest without coming in 0 ct, necessarily, with the cam. The bloclgc is fitted securely but loosely in thisrecess, that it may freely rise and fal herein.

The cam-shape lever \works in a slot narofithe recess intowhich it opens, and the cam i so formed that when the lever is pressed into a position approximately parallel with the sha it holds the block firmly against the serrate edge of the shank; but when the lever e is/ turned into the position shown in Fig. 4it permits the block to drop to the bottom of the necess, and consequently to ride freely over th serration of the shank.

As the rectan g1, lar block fits within the recess of corresponding shape, when it is free from the cam, it is guided accurately by the sides and moves freely without any liability to bind, and the /movable jaw may be slipped back and forth without danger of sticking upon .the way.

The cam,s'hould be so shaped that when it is broughtto bear upon the block its projecting edge'will wedge against such block and hold the handle stationary until forcibly moved.

event of wear upon the block 0 the compensating plate or plates f, Fig. 3, may be placed in the bottom of thgtrecess underneath the block, where they will be held accurately by said bottom parallel with the block and the face of the shank.

I have thus endeavored to overcome, on the one hand, the difficulties-sought to be avoided in the patent of McManus by attaching the block to a spring, and, on the other, the difficulty likely to arise from binding and the impossibility of using compensating plates where the block rests against the edge of the cam by which it is pressed down. 1

Itwill be understood that when the handle is turned as in Fig. 4,1he cam face drops below the bottom of the recess.

Having thus described my invention, what 1 claim is- In combination with the serrated shank of a wrench, a movable jaw provided with a recess, I), a cam-lever, e, and a block, 0, having a serrated side and adapted to move freely in the recess and to rest upon the bottom thereof, substantially as described.

I In testimony whereof I have signed my name 5 to this specification in the presence of two subscribing witnesses.

WILLIAM G. GODDINGTON. Witnesses L. W. SEELY, F. L. MIDDLETON. 

